Abstract:
:A 53-year-old patient had a complex ventricular arrhythmia, which most likely was an intermittent pure (nonmodulated) parasystole, due to protection limited to the first part of the cycle coexisting with exit block. However, other interpretations of the observations were possible. Foremost among these was modulated parasystole with partial protection or with an attenuated or nondetectable early delaying phase, with exit block. Interestingly, the parasystole appeared to have fulfilled the dynamic rules regarding the number of sinus beats interposed between manifest parasystolic beats, as has been reported for pure or weakly modulated parasystole. This case corroborates unusual manifestations of an arrhythmia, which because of its newly found complexities and various possible interpretations seems to be discussed with decreasing frequency in most textbooks on general cardiology.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Castellanos A,Moleiro F,Guerrero J,Awaad MI,Myerburg RJdoi
10.1016/s0022-0736(97)80046-5subject
Has Abstractpub_date
1997-10-01 00:00:00pages
331-5issue
4eissn
0022-0736issn
1532-8430journal_volume
30pub_type
杂志文章abstract::This contribution discusses the dominant T wave, a concept providing an overall view on the repolarization currents of the ventricular myocardium. The dominant T wave is a weighted mean of the T waves on the body surface. It can be estimated from the matrix of sampled observed potentials. The timing of its peak reveal...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
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更新日期:2004-01-01 00:00:00
abstract::VPC morphology was studied in the surface 12-leads ECGs (resting) in one hundred and thirty-six patients over a none-month period (January-September, 1978). Seventy four (54%) of these had coronary artery disease proven by cardiac catheterization (61) or by evidence of acute transmural myocardial infarction (13) diagn...
journal_title:Journal of electrocardiology
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doi:10.1016/s0022-0736(80)80083-5
更新日期:1980-10-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2008.06.016
更新日期:2008-11-01 00:00:00
abstract:UNLABELLED:PROBLEM PRESENTED: A novel study of catheter ablation of the right pulmonary artery ganglionated plexi (RPA GP) to reduce atrial fibrillation (AF) originating in the pulmonary veins (PVs) is presented. STUDIES UNDERTAKEN:In 20 dogs, atrial effective refractory periods (AERPs), PVERP, and the dispersion of A...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.03.007
更新日期:2010-07-01 00:00:00
abstract::Frank vectorcardiograms (VCGs) were collected on magnetic tape for 666 normal newborn infants at 1, 6, 12, 24, 36, 48, 60, and 72 hours after birth and analyzed by computers. The final total included 1,337 VCGs for white babies and 413 for blacks. No previous report has been made for the normal neonate with such a lar...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(77)80027-7
更新日期:1977-01-01 00:00:00
abstract::We report a case of 54-year-old man who presented to hospital with severe prolonged retrosternal chest pain of anginal nature. Electrocardiogram taken by his general practitioner showed minimal ST elevation in chest leads V1 and V2; there was also marked right axis deviation of P wave (negative in lead I and aVL) and ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2005.06.036
更新日期:2005-10-01 00:00:00
abstract::The long QT syndrome is an inherited arrhythmogenic disease characterized by prolongation of QT interval, syncope, and sudden cardiac death because of ventricular tachycardia, mainly in the form of Torsades de Pointes. We present an unusual case of prolonged QT interval and cardiac arrest caused by Torsades de Pointes...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.12.001
更新日期:2011-05-01 00:00:00
abstract::We found significant variation within each computer and cardiologist method for measurement of the ECG waveform intervals. Comparison between methods revealed that the HP system had a smaller variability than the MAC or the cardiologist, and that the MAC had a smaller variability than the cardiologist. No variability ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(07)80110-5
更新日期:1989-01-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.02.003
更新日期:2010-05-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(85)80016-9
更新日期:1985-10-01 00:00:00
abstract::The objective of this article is to present a set of methods for constructing realistic computational models of cardiac structure from high-resolution structural and diffusion tensor magnetic resonance images and to demonstrate the applicability of the models in simulation studies. The structural image is segmented to...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2008.12.003
更新日期:2009-03-01 00:00:00
abstract::Isolated T wave alternans (TWA) could be consistently induced in 13 dogs by infusion of an acid dextrose solution (ACD) and in nine with a 2% EDTA disodium solution. To study the factors concerned in evoking TWA, serial determinations of total and ionized serum calcium (ICa), Mg, K, pH, pCO2 and pO2 were performed. Ar...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(78)80098-3
更新日期:1978-04-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2012.03.005
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVE:The purpose of this study is to investigate the effect of cardiac resynchronization therapy (CRT) on P wave maximum duration (PWM) and P wave dispersion (PWD) in patients with advanced heart failure. METHODS:Forty-six patients (33 men; mean age, 60 +/- 11 years) with CRT were enrolled in the present study. P...
journal_title:Journal of electrocardiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.jelectrocard.2009.02.005
更新日期:2009-07-01 00:00:00
abstract::The ECG phenomena in 20 outpatients (121 episodes) suffering from variant angina with transient ST segment elevation greater than 1.5 mm. (Prinzmetal angina) were studied by Holter monitoring. The most important changes in the ECG morphology were: a) increased height of the R wave in all cases, b) the S wave decreased...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(85)80051-0
更新日期:1985-07-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2020.07.001
更新日期:2020-01-01 00:00:00
abstract::This study investigates a technique to estimate dispersion based on the root mean square (RMS) signal of multiple electrocardiographic leads. Activation and recovery times were measured from 64 sites on the epicardium of canine hearts using acute in situ or Langendorff perfused isolated heart preparations. Repolarizat...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(00)80073-4
更新日期:2000-04-01 00:00:00
abstract::An inexpensive system was developed for automated on-line analysis of ST segment heights, Q, R, and S heights and areas under these peaks, using an LSI-11 microcomputer. System accuracy was evaluated using a computer graphics technique which enabled magnification and labelling of the computed peaks on 60 maps from 17 ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(82)80032-0
更新日期:1982-01-01 00:00:00
abstract::The dominant T wave (DTW) reflects the derivative of the repolarization phase of the transmembrane potential of myocytes. T-wave alternans (TWA) is defined as an alteration of this repolarization that repeats every other beat. We investigate if the DTW can offer new insight on TWA. We first proved that the DTW estimat...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.11.017
更新日期:2011-03-01 00:00:00
abstract::This study is a descriptive report of the occurrence of ventricular arrhythmias in a large, prospectively designed follow-up study of postcoronary patients. Six-hour Holter recordings were obtained on 954 postinfarction patients prior to hospital discharge and at 4 (n = 837), 8 (n = 762), 12 (n = 713), and 24 (n = 487...
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pub_type: 杂志文章
doi:10.1016/s0022-0736(80)80043-4
更新日期:1980-04-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(87)80080-8
更新日期:1987-11-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(85)80024-8
更新日期:1985-10-01 00:00:00
abstract::The electrocardiogram (ECG) remains the most immediately accessible and widely used diagnostic tool for guiding emergency treatment strategies. The ECG recorded during acute myocardial ischemia is of diagnostic, therapeutic, and prognostic significance. In patients with myocardial ischemia as a result of decreased blo...
journal_title:Journal of electrocardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jelectrocard.2009.07.009
更新日期:2010-03-01 00:00:00
abstract::The Brugada syndrome (BS) accounts for approximately 20% of cases of sudden cardiac death in patients with structurally normal hearts. The electrophysiologic basis for ST-segment elevation in the precordial electrocardiogram (ECG) leads that characterize the Brugada phenotype and its strong linkage to ventricular tach...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2010.07.008
更新日期:2010-09-01 00:00:00
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journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2006.07.008
更新日期:2007-07-01 00:00:00
abstract::The pathophysiological mechanisms of altered transmembrane potentials in diseased human atria were investigated in 20 patients who were divided into group A (normal) and group B (diseased). The electrophysiological data of right atrial tissues measured with glass microelectrodes included maximum diastolic potentials (...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(86)80006-1
更新日期:1986-01-01 00:00:00
abstract::Continuously updated ST-segment recovery analysis has been shown to accurately predict infarct-related artery patency. Salient principles were converted into algorithms and incorporated into a portable ST monitor for optimal application. This study tested the automated program's ability to detect occlusion and reperfu...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(96)80090-2
更新日期:1996-10-01 00:00:00
abstract::Placement of the precordial electrodes for recording a 12-lead electrocardiogram (ECG) is subject to variation. Previous research has shown that displacement, especially in the longitudinal direction, can lead to changes in diagnosis. In practice, both the displacement and the effects of displacement on an individual ...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/s0022-0736(96)80002-1
更新日期:1996-01-01 00:00:00
abstract:BACKGROUND:No direct comparison of current electrocardiogram (ECG) interpretation programs exists. OBJECTIVE:Assess the accuracy of ECG interpretation programs in detecting abnormal rhythms and flagging for priority review records with alterations secondary to acute coronary syndrome (ACS). METHODS:More than 2,000 di...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/j.jelectrocard.2019.11.043
更新日期:2020-01-01 00:00:00
abstract::Electrocardiographic manifestation mimicking the hyperacute phase of myocardial infarction and the electrical alternans of the elevated ST-segment in association with subarachnoid hemorrhage were reported in two patients with no evidence of heart disease. In both cases the ST-segment changes were transient and there w...
journal_title:Journal of electrocardiology
pub_type: 杂志文章
doi:10.1016/0022-0736(89)90082-4
更新日期:1989-04-01 00:00:00